<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>38467</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>197</pageFirst>
    <pageLast>207</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>2016</volume>
    <type>article</type>
    <publisherName>Springer-Verlag Berlin</publisherName>
    <publisherPlace>Heidelberg</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">IR-MALDI ion mobility spectrometry: physical source characterization and application as HPLC detector</title>
    <abstract language="eng">Infraredmatrix-assisted laser dispersion and ionization(IR-MALDI) in combination with on mobility (IM) spectrometry enables the direct Analysis of biomolecules in aqueous solution. The release of ions directly from an aqueous solution is based on a phase explosion, induced by the Absorption of an IR laser pulse, which disperses the liquid as vapor, nano- and micro-droplets. The ionization process is characterized initially by a broad spatial distribution of the ions, which is a result of complex fluid dynamics and desolvation kinetics. These processes have a profound effect on the shape and width of the peaks in the IM spectra. In this work, the Transport of ions by the phase explosion-induced shockwave could be studied independently from the transport by the electric field. The shockwave-induced mean velocities of the ions at different time scales were determined through IM spectrometry and shadowgraphy. The results show a deceleration of the Ions from 118m∙s−1 at a distance of 400 μm from the liquid surface to 7.1 m∙s−1 at a distance of 10 mm, which is caused by a pileup effect. Furthermore, the desolvation kinetics were investigated&#13;
and a first-order desolvation constant of 325 ± 50 s−1&#13;
was obtained. In the second part, the IR-MALDI-IM&#13;
spectrometer is used as an HPLC detector for the twodimensional separation of a pesticide mixture.</abstract>
    <parentTitle language="eng">International Journal for Ion Mobility Spectrometry</parentTitle>
    <identifier type="doi">10.1007/s12127-016-0208-1</identifier>
    <author>J. Villatoro</author>
    <author>M. Zühlke</author>
    <author>D. Riebe</author>
    <author>T. Beitz</author>
    <author>M. Weber</author>
    <author>Jens Riedel</author>
    <author>H.-G. Löhmannsröben</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ion mobility spectrometry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>IR-MALDI</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Shadowgraphy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>37615</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>6259</pageFirst>
    <pageLast>6268</pageLast>
    <pageNumber/>
    <edition/>
    <issue>23</issue>
    <volume>408</volume>
    <type>article</type>
    <publisherName>Springer-Verlag</publisherName>
    <publisherPlace>Heidelberg</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">IR-MALDI ion mobility spectrometry</title>
    <abstract language="eng">The novel combination of infrared matrix-assisted laser dispersion and inization (IR-MALDI) with ion mobility (IM) spectrometry makes it possible to investigate biomolecules in their natural environment, liquid water. As an alternative to an ESI source, the IR-MALDI source was implemented in an in-house-developed ion mobility (IM) spectrometer. The release of ions directly from an aqueous solution is based on a phase explosion, induced by the absorption of an IR laser pulse (λ = 2.94 μm, 6 ns pulse width), which disperses the liquid as nano- and micro-droplets. The prerequisites for the application of IR-MALDI-IM spectrometry as an analytical method are narrow analyte ion signal peaks for a high spectrometer resolution. This can only be achieved by improving the desolvation of ions. One way to full desolvation is to give&#13;
the cluster ions sufficient time to desolvate. Two methods for achieving this are studied: the implementation of an additional drift tube, as in ESI-IM-spectrometry, and the delayed extraction of the ions. As a result of this optimization procedure, limits of detection between 5 nM and 2.5 μMas well as linear dynamic ranges of 2–3 orders of magnitude were obtained for a number of substances. The ability of this method to analyze simple mixtures is illustrated by the separation of two different surfactant mixtures.</abstract>
    <parentTitle language="eng">Analytical and bioanalytical chemistry</parentTitle>
    <identifier type="doi">10.1007/s00216-016-9739-x</identifier>
    <identifier type="issn">1618-2650</identifier>
    <identifier type="issn">1618-2642</identifier>
    <enrichment key="date_peer_review">30.09.2016</enrichment>
    <author>J. Villatoro</author>
    <author>M. Zühlke</author>
    <author>D. Riebe</author>
    <author>Jens Riedel</author>
    <author>T. Beitz</author>
    <author>H.-G. Löhmannsröben</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ion mobility</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Spectrometry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>IR-MALDI</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
</export-example>
